Confirmed Exoplanet Discovered 2021

KMT-2018-BLG-1743L b

A gas giant orbiting the unknown KMT-2018-BLG-1743L, located approximately 21,144.7 light-years from Earth.

Key parameters at a glance

  • A radius of 10.50 Earth radii
  • A mass of 77.87 Earth masses
  • Surface gravity around 0.71 g
  • Semi-major axis 1.4490 AU
  • Distance from Earth 21,144.69 light-years
  • Earth Similarity Index 0.296
  • Travel time at Voyager 1 speed 372,886,649 years

KMT-2018-BLG-1743L b Planet Profile

Physical Specs

Radius
10.50 R⊕
Radius (Jupiter)
0.937 R♃
Mass
77.87 M⊕
Mass (Jupiter)
0.245 M♃
Density
0.37 g/cm³
Surface Gravity
0.71 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.296
HZ Position Unknown
Controversial No

Discovery

Year 2021
Method Microlensing
Facility KMTNet
Telescope 1.6 m wide-field telescope

Size rank in cohort

Rank by radius

#1731of 1771

top 97.7%

This planet

10.50R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

Metric Earth KMT-2018-BLG-1743L b Jupiter
Radius (R⊕)1.0010.5011.21
Mass (M⊕)1.0077.87317.83
Density (g/cm³)5.510.371.33
Surface Gravity (g)1.000.712.53
Insolation (S⊕)1.000.037

Alternative Mass Estimates

Method Value Interpretation
Best measured mass 77.868 M⊕ Direct mass measurement (not derived).

Percentile among Gas Giant cohort

Radius 10.500 R⊕ · percentile 2 / cohort 1771
Mass 77.868 M⊕ · percentile 2 / cohort 1747
Distance 6,483.00 pc · percentile 96 / cohort 1759
ESI 0.296 · percentile 57 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period
days
Semi-major axis
1.4490 AU
Eccentricity
Inclination
°

Year Length

Orbital period for this planet has not yet been measured.

Eq. Temperature

 

Insolation (S⊕)

Earth = 1.00

Earth Similarity (ESI)

0.296

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Han et al. 2021

Instrument

18k Mosaic CCD camera

Publication

2021-08

Observation locale

Ground

Host System: KMT-2018-BLG-1743L

Spectral Class

Unknown

Effective Temperature

Estimated Age

Stellar Radius

Stellar Mass

0.193 M☉

Metallicity [Fe/H]

Distance
6,483.00 parsec
Light-years 21,144.69 ly
V-band magnitude
mag
Voyager-speed travel 372,886,649 yr

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